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'use strict';
const common = require('../common.js');
const assert = require('assert');
const Writable = require('stream').Writable;
const util = require('util');
const methods = [
'restAndSpread',
'argumentsAndApply',
'restAndApply',
'restAndConcat'
];
var bench = common.createBenchmark(main, {
method: methods,
concat: [1, 0],
n: [1000000]
});
const nullStream = createNullStream();
function usingRestAndConcat(...args) {
nullStream.write(`this is ${args[0]} of ${args[1]}\n`);
}
function usingRestAndSpreadTS(...args) {
nullStream.write(`${util.format(...args)}\n`);
}
function usingRestAndApplyTS(...args) {
nullStream.write(`${util.format.apply(null, args)}\n`);
}
function usingArgumentsAndApplyTS() {
nullStream.write(`${util.format.apply(null, arguments)}\n`);
}
function usingRestAndSpreadC(...args) {
nullStream.write(`${util.format(...args)}\n`);
}
function usingRestAndApplyC(...args) {
nullStream.write(`${util.format.apply(null, args)}\n`);
}
function usingArgumentsAndApplyC() {
nullStream.write(`${util.format.apply(null, arguments)}\n`);
}
function runUsingRestAndConcat(n) {
var i = 0;
bench.start();
for (; i < n; i++)
usingRestAndConcat('a', 1);
bench.end(n);
}
function runUsingRestAndSpread(n, concat) {
const method = concat ? usingRestAndSpreadC : usingRestAndSpreadTS;
var i = 0;
bench.start();
for (; i < n; i++)
method('this is %s of %d', 'a', 1);
bench.end(n);
}
function runUsingRestAndApply(n, concat) {
const method = concat ? usingRestAndApplyC : usingRestAndApplyTS;
var i = 0;
bench.start();
for (; i < n; i++)
method('this is %s of %d', 'a', 1);
bench.end(n);
}
function runUsingArgumentsAndApply(n, concat) {
const method = concat ? usingArgumentsAndApplyC : usingArgumentsAndApplyTS;
var i = 0;
bench.start();
for (; i < n; i++)
method('this is %s of %d', 'a', 1);
bench.end(n);
}
function main(conf) {
const n = +conf.n;
switch (conf.method) {
case 'restAndSpread':
runUsingRestAndSpread(n, conf.concat);
break;
case 'restAndApply':
runUsingRestAndApply(n, conf.concat);
break;
case 'argumentsAndApply':
runUsingArgumentsAndApply(n, conf.concat);
break;
case 'restAndConcat':
if (conf.concat)
runUsingRestAndConcat(n);
break;
default:
throw new Error('Unexpected method');
}
}
function createNullStream() {
// Used to approximate /dev/null
function NullStream() {
Writable.call(this, {});
}
util.inherits(NullStream, Writable);
NullStream.prototype._write = function(cb) {
assert.strictEqual(cb.toString(), 'this is a of 1\n');
};
return new NullStream();
}
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